Improvement in car-springs



- MARSHALL.

car Spring. Ptented Jun--14,--1864 N. FETERS. FHOTO-UTHOGRAPHEH. WAININGTON. D. C

' UNITED STATES PATENT OFFICE.

WILLIAM MARSHALL, OF NEW YORK, N. Y.

IMPRQVEMENT IN CAR-SPRINGS.

Specification forming part of Letters Patent No. 43.12l, dated Jnne 14, 1864.

To all whom it nmy concern:

Be it known that I, WILLIAM MARSHALL, of the city, county, and State of New York, have invented a new and Improved Spring for Railroad-Cars and other Wheel Vehicles and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompaiyig d'awings, forming part of this specification, lll which--- Figure 1 is a side scetional view of my invention, taken in the line x x, Fig. 2. Fig. 2 is aho-izontal section of the same, taken in the line y y, Fig. 1.

Similar letters of reference indicate like parts. i

This invention consists in the enploynet or use of spiral springs arranged and combined with levers in such a manner that a strong and durable spring will be obtained, and one which Ina-y be constructed at a very moderate cost.

The object of the invention is to obtain a spring which will possess as much elastieity as the ordinary elliptic or senielliptic springs and be equally as durable, and still be capable of being cheaply constructed and readily repaired when necessary. The elliptic or semielliptic springs, although far preferable to any hitherto constrncted, are too expensive for general use, and are applied only to the more expensive style of cars.

For railroad cars I construet ny invention of a rectangular box, A, provided with a lid, a, which is allowed to frecly rise and fall over the lower part, b, and within this box I place two levers, B B, each of which has a trans verse senicylindrical projection, c, at its under side, said projections working in similar recesses, d, in the bottom of the box, as shown in Fig. l. i

0 G are spiral springs which are interposed or cover ar ot' the box A.

between the outer ends of the levers B B and lateral projections e e at the upper end of the lower part, b, of the box A, and D D D D are spiral springs which are interposed between the inner ends of the levers B B and the top The springs D do not bear directly'o the levers B, butrest on a plate, E, which bears on the inner ends of the levers and works between guides ffat the sides ot' the lower part, b, of the box A, two opposite sides of the'plateE being notched to receive the guides f f, as shown in Fig. 2.

The boxes A, when the nvention is applicd to railroad-cars, are inserted in pcdestals in the usual way, the weight ot' the car rcsting on the tops 'or covers a, the boxes being between the car and the bearings ot'the axles. By this arrangenent it will be seen that the six springs sustain the weight, the levers B transmitting the weight from the springs D to the springs G. Thus I obtain within alimited space a strong, durable, and economical spring, one equally as good as the expensive elliptic or seni-elliptic ones.

I would remark that I do not confine myself to the precise arrangement or disposition of the parts as herein shown, for that may be varied as circumstances may require, and the box A dispensed with in certain cases, espe 'cially when the device is applied to ordinary road-vehicles, such as drays or trucks.

I claim as new and desire to secure by Letters Patenti The combination of the springs G D and levers B, arranged substantially as shown, and either with or without the box A, to operate in the manner as and for the purpose set forth.

WV] LLIAM MARSH ALL.

Witncsses:

M. M. LIVINGSTON, GEO. W. REED. 

